I am currently upgrading from a 40g to a 75 gallon. At the moment I have a percula, 6 line wrasse, 2 3-striped damsels, and a gramma. I have had the percula for 10 years and it is clearly the most dominant of the tank. I have had to add fish that could hold their own with it. Now that i have a liitle more room i would like to add to the livestock. Any suggestions for reef compatible fish that can join these guys without any problems??